Development of Lidar wind measurement techniques · SWE (within LIDAR project) • Designed for...

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Gefördert auf Grund eines Beschlusses des Deutschen Bundestages Projektträger Koordination Development of Lidar wind measurement techniques Andreas Rettenmeier J. Anger , O. Bischoff , M. Hofsäß, D. Schlipf , I. Würth, P. W. Cheng Stuttgart Wind Energy (SWE) - University of Stuttgart RAVE 2012 Bremerhaven, 8.-9.5.2012

Transcript of Development of Lidar wind measurement techniques · SWE (within LIDAR project) • Designed for...

Page 1: Development of Lidar wind measurement techniques · SWE (within LIDAR project) • Designed for nacelle-based applications • Adapted to Windcube by AventLidar Technology • Allows

Gefördert auf Grund eines Beschlusses des Deutschen Bundestages Projektträger Koordination

Development of Lidar wind measurement techniques

Andreas Rettenmeier

J. Anger , O. Bischoff , M. Hofsäß, D. Schlipf, I. Würth, P. W. Cheng

Stuttgart Wind Energy (SWE) - University of Stuttgart

RAVE 2012 Bremerhaven, 8.-9.5.2012

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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012

Table of Contents

• Motivation

• The projects and their aims

• Project partners

• Lidar systems

• Ground-based measurements

• Nacelle-based measurements

• Conclusions & Outlook

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Turbine development & research

• Higher temporal and spatial resolution of the wind field

• Power curve determination over the swept rotor area

• Loads, wake from other turbines

• Control (fatigue and extreme loads)

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. B

MU

, R

isø

-DTU

]

Motivation: Lidar technology The new quality in wind measurement

Site evaluation & wind potential analyses

• Onshore: „complex terrain“, forest

• Offshore

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LIDAR II project (2010-2013)

- on-/offshore -

• Lidar assisted control tests for load

reduction and energy yield

optimization

• Prototype of a robust, nacelle-based

Lidar system, test in alpha ventus

• Methods of power performance

behaviour of turbines with nacelle-

based Lidar

LIDAR I project (2007-2010)

- onshore -

• Lidar measurements

ground- and nacelle-based

• Development of Lidar scanner

• Wake, p-v and control applications

OWEA project (2008-2011)

- offshore -

• 2 scanning Lidar devices offshore

• Nacelle-based Lidar measurements

• Comparison with FINO I data

The projects and their aims

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Project partners within LIDAR, LIDAR II & OWEA

Research Institutes

• Stuttgart Wind Energy (SWE) - Universität Stuttgart

• ForWind - Carl von Ossietzky Universität

• DLR: Institute of Atmospheric Physics

Measurement Institutes

• DEWI GmbH: German Wind Energy Institute

• Germanischer Lloyd Garrad Hassan

Wind turbine manufacturer

• AREVA Wind GmbH

• REpower Systems SE

Dissemination

• FGW e.V.: German Federation of Windpower

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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012

Ground-based Lidar measurements

SWE – Stuttgart Windenergie, Universität Stuttgart

ForWind – Universität Oldenburg

DLR- Deutsches Zentrum für Luft- und Raumfahrttechnik e.V.

DEWI GmbH

AREVA Wind GmbH

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Lidar Systems

Windcube™ system from

Leosphere ™ DLR long-range Lidar

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• Range 500 m - 10 km • Wavelength: 2.022 µm • Pulse length: 75 m • Pulse energy: 1.5 mJ

• Range 40m – 220m • Wavelength: 1,54 µm • Pulse length: 26m • Pulse energy: 10µJ

[Fig

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sph

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, D

LR

]

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Lidar-Test in Bremerhaven and at FINO 1

• Location: FINO1 platform

• Period: August 2009 - July 2010

• up to 44.190 10-min. data sets

• Resolution:

• 10-min

• 10 Hz (0.1 s) [FINO1]

• ~0.83 Hz (1.2 s) [LIDAR]

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[Fig

. SW

E,

DEW

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AREVA Wind GmbH

M5000 prototype

• Rated power: 5 MW

• 116 m rotor diameter

• 102 m hub height

Measurement project

• April 2008 – March 2010

• Power curve and load measurement

• Met mast (102 m height)

• Meteorological sensors

• Data acquisition system

• Lidar device (ground, nacelle)

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DLR long-range Lidar Measurements

• Results of elevation scans • 3km measurement range • Low-Level-Jet determination

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[Fig

. D

LR

]

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Nacelle-based Lidar measurements

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SWE – Stuttgart Windenergie, Universität Stuttgart

ForWind – Universität Oldenburg

DEWI GmbH

Germanischer Lloyd – Garrad Hassan

AREVA Wind GmbH

REpower Systems SE

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Motivation

Reasons for developing nacelle-based Lidar measurement techniques

• Increasing hub heights and rotor diameter of wind turbines

• Cost expansive certification procedures

• For on- and offshore purposes

Nacelle-based Lidar wind field measurements taking into account

• Whole swept rotor disc

• Wind direction (slow variation) yaw correction

• Horizontal wind shear, vertical wind shear (fast variation)

• More free valid measurement areas (acc. IEC 61400-12-1) Less sectors to exclude Faster measurement campaigns (on- and offshore)

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Measuring the incoming wind for

• Wind turbine certification

• Power performance testing

• Load validation

• Predictive control strategies

[Fig

. SW

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Measuring the turbines wake wind for

• Validation of wake models

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Development of a Lidar Scanner

• Scanner and control software developed by SWE (within LIDAR project)

• Designed for nacelle-based applications • Adapted to Windcube by AventLidar

Technology • Allows steering the laser beam in any

direction • Proof-of- concept demonstrated in various

measurement campaigns on- and offshore (Bremerhaven, Risø-DTU, NREL, alpha-ventus)

[Fig

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sph

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, SW

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Development of a robust Lidar

• Under development, by Forwind-Oldenburg (within LIDAR II project)

• Designed for nacelle-based applications • Proof-of- concept demonstration onshore and offshore at

alpha ventus (planned)

[Fig

. Fo

rwin

d-O

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Experiment setup - Bremerhaven

LIDAR system installed on the nacelle (May 2009-March 2010) [F

ig. SW

E]

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Lidar scanner

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[Fig

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WI, G

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REpower 5M & AREVA Wind M5000 – inflow and wake

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Power curve determination and Statistical Load Estimation

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[Fig

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Results of nacelle-based near wake measurements (AREVA M5000, AV7, alpha ventus)

[SW

E]

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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012

Conclusions & Outlook

• Development of a scanning Lidar system

• Development of wind turbine applications using a Lidar for

• power curve determination (ground- and nacelle-based)

• wind turbine control (predictive control strategies)

• wake wind field analysis (wake modelling and measurement)

• Offshore test of Lidar device on FINO 1

• Lidar measurements on two offshore wind turbines in “alpha ventus”,

• Further development and test of robust Lidar device

• Proof-of-concept of predictive control

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Session 5: Wind turbine control and wind farm flow 5.1 Lidar-assisted wind turbine control Project: RAVE - LIDAR, RAVE - LIDAR II D. Schlipf et al., Stuttgart Wind Energy (SWE), University of Stuttgart 5.5 Analysis of wake-induced wind turbine loads Project: RAVE - OWEA J.J. Trujillo, B. Kuhnle, H. Beck, ForWind - University of Oldenburg Session 6: Site conditions 6.4 Statistics of extreme wind events and power curve monitoring Project: RAVE - LIDAR, RAVE - OWEA Dr. M. Wächter, ForWind - University of Oldenburg

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Thank you for your attention!

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